[isolation and identification of Yersinia enterocolitica (author's transl)].

The classification of the Yersinia enterocolitica group into the true Yersinia enterocolitica and the Yersinia enterocolitica-like types based on DNA structure, pathogenicity, host-adaptation and ecology, tables III and IV, is now so well established that relatively few biochemical tests, table I, easily differentiate the true Yersinia enterocolitica from the Yersinia enterocolitica-like types, and further differentiate the 6 biotypes, table II. The isolation technique is described in details and in a flow diagram, table V. The use of a selective enrichment- and subcultivation-technique separate the human-pathogenic serotypes from the environmental, saprophytic types.